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leaky end cap

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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leaky end cap

Unread postAuthor: pumpkin2themax » Mon Oct 09, 2006 9:25 pm

i'm using a threaded end cap on my metered propane gun. It is leaking pressure when i dump the propane into the chamber. Tightening the cap helps, but doesnt solve the problem. Would a new cap possibly fix this issue? or should I start over and use a ball valve instead. I've seen lots of propane guns that use threaded end caps that seem to work fine... what am i missing?
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Unread postAuthor: Extrusion » Mon Oct 09, 2006 9:34 pm

they probably make the cap crappy try adding some teflon tape (used on threads to prevent leaks.) to it that should work.

i had the same problem so i just added some teflon tape and now its so air tight i wouldnt be able to load it with the end cap on lol.
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Unread postAuthor: pumpkin2themax » Mon Oct 09, 2006 9:36 pm

How does the tape stand up to multiple shots?
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Unread postAuthor: Extrusion » Mon Oct 09, 2006 9:38 pm

pretty good its stood up to about 60 or so shots for me and i dont see any real signs of wear or tear on it.

this link might help http://www.burntlatke.com/cleanout.html
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Unread postAuthor: pumpkin2themax » Mon Oct 09, 2006 9:41 pm

cool, I'll give it a try. I think my problem was that i might have tried to clean up the threads a little too agressively... I'll try the tape, thanks a lot.
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Unread postAuthor: Extrusion » Mon Oct 09, 2006 9:53 pm

No problem always glad to help :D

EDIT: Here is a link you may find usefull http://www.acmehowto.com/howto/homemain ... teflon.php
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